Here You can find a list of airlines which operated in Porto airport.
Tirana - AirBourbon
Brussels-Charleroi - Ryanair
Sofia - Arubaanse Luchtvaart
Aalborg - Overland Airways
Billund - Ryanair
Copenhagen Kastrup - Ryanair
Ajaccio Corsica - Corse-Mediterranee
Basel Mulhouse Freiburg - easyJet
Bergerac - Ryanair
Bordeaux - Ryanair, easyJet
Brest Bretagne - Transavia France
Carcassonne - Ryanair
Clermont - Ferrand - Ryanair
La Rochelle - Ryanair
Lille - Ryanair
Lyon - Transavia France
Marseille Provence - Ryanair
Nimes - Ryanair
Nice - easyJet, TRIP Linhas A
Paris Charles de Gaulle - AirFrance, KLM Royal, WestJet, Delta, City Connexion Airlines, Kenya Airways, SATA International, easyJet, TNT, Arubaanse Luchtvaart, FedEx Express
Paris Orly - Leeward Islands Air Transport, Transavia France, Formosa Airlines, SATA International, Transavia Holland, TAP Portugal, TRIP Linhas A, Iberia, easyJet
Strasbourg - Ryanair
Toulouse Blagnac - easyJet, Ryanair, Eurowings
Athens - Aegean, Volotea
Heraklion - Ryanair
Birmingham International - Ryanair
Bristol - easyJet, Ryanair
Leeds Bradford - Ryanair
Liverpool John Lennon - Ryanair
London Gatwick - TAP Portugal
London Luton - easyJet
London Stansted - Ryanair, Pacific Wings
Manchester - easyJet, Ryanair
London Heathrow - British, American Airlines, QatarAirways, Finnair
Amsterdam Schiphol - KLM Royal, Delta, Transavia Holland
Eindhoven - Ryanair
Maastricht Aachen - Ryanair
Dublin - Ryanair
Shannon - Ryanair
Bari - Ryanair, Delta
Bologna - Ryanair
Cagliari Sardinia - Ryanair
Milan Bergamo - Ryanair
Olbia Sardinia - Hellenic Imperial
Rome Ciampino - Ryanair
Rome Fiumicino - WizzAir
Trapani - Ryanair
Treviso - Ryanair
Turin - Ryanair
Venice Marco Polo - easyJet
Verona - Ryanair
Riga - Overland Airways, Trans Pas Air, AirBaltic, Carpatair
Malta Luqa - Ryanair, Overland Airways
Molde Arø - Overland Airways
Oslo Gardermoen - Norwegian AirShuttle
Vienna Schwechat International - Austrian, Ryanair
Wroclaw - Ryanair
Katowice - LOT
Krakow - Ryanair
Warsaw Modlin - Ryanair
Warsaw Chopin - WizzAir
Faro - Ryanair, Hellenic Imperial
Madeira Funchal - TAP Portugal, easyJet, Ryanair, Lufthansa, SATA International, Delta
Ponta Delgada - SATA International, Trans Pas Air, AirFrance, Ryanair
Lisbon Portela - Emirates, AirBaltic, KLM Royal, SATA International, Azul, City Connexion Airlines, Lufthansa, Delta, United Airlines, WestJet, Kenya Airways, TAP Portugal, Turkish, Finnair, AirFrance, AirCanada, LOT
Edinburgh - Ryanair, AirAfrique
Stockholm Arlanda - Ryanair, Overland Airways
Stockholm Bromma - Overland Airways
Geneva - Swiss International, TAP Portugal
Zürich - Swiss International, TAP Portugal, AirCanada, Finnair, SATA International, Trans Pas Air, easyJet, Edelweiss
Ljubljana - TradeAir, Overland Airways
Alicante - Ryanair, Iberia
Barcelona El Prat - QatarAirways, Formosa Airlines, Ryanair, Iberia, Arubaanse Luchtvaart, LAN Airlines
Bilbao - Iberia, Formosa Airlines, Volotea, TAP Portugal
Ibiza - Formosa Airlines, easyJet
Las Palmas Gran Canaria - Ryanair, Iberia, Hellenic Imperial
Madrid Barajas - Formosa Airlines, American Airlines, AirEuropa, AeroMéxico, QatarAirways, AirSerbia, Iberia, LAN Airlines, Saudi Arabian, Delta, Ryanair, easyJet, Alitalia, KuwaitAirways, TAAG Angola Airlines, Tarom, Cathay Pacific
Malaga Costa del Sol - Ryanair
Palma de Mallorca - Ryanair, Iberia
Seville - Ryanair
Tenerife South - Ryanair, Hellenic Imperial, Travel Service
Valencia - Ryanair
Istanbul Atatürk - Turkish, IndiGo, Trans Pas Air
Budapest - Ryanair, Overland Airways
Bremen - Ryanair
Dortmund - Ryanair
Düsseldorf - Eurowings
Frankfurt am Main - United Airlines, TAP Portugal, Lufthansa, All Nippon Airways, AirCanada, Singapore Airlines, Luxair, Scandinavian Airlines System
Frankfurt Hahn - Ryanair
Köln Bonn - Ryanair
Memmingen - Ryanair
Munich - Lufthansa
Nuremberg - Ryanair
Stuttgart - Eurowings
Weeze - Ryanair